So I just moved into a new apartment with my cats, who are 2 and 3 years old. They used the litter box in my old house, but when I moved I'm not sure what changed. To add to the story, I lived in my new apartment for 3 days before I went on a small deployment(active duty) for roughly 2 months, I had a friend looking after them while I was gone. When I came back my apartment was wrecked, they pooped and peed all over my bed and the litter box was a mess. Anyways, I completely changed our all the litter so it's all new. But the cats still don't want to pee in it. Does anyone have any explanations? Any advice would really help. Thank you.